9 VBN THREADED CONTROL BALL VALVES AND ACTUATORS Effective C V For effective C V s for Honeywell control ball valves when used with pipe reducers, refer to the Product Data sheet form no Application Notes IMPORTANT Valve sizing is important for correct system operation. Undersized valves do not have sufficient capacity at maximum load. Oversized valves do not have sufficient authority over the load in modulating applications. Proper Use Oversized valves can cause excessive cycling and the seat and ball can be damaged because of the restricted opening. These valves are only for use in cold, warm, and hot water systems. Not suitable for oil, combustible gases, or steam. They are designed for a medium temperature range of from 5 to 250 F, at a maximum pressure of 60 psig VBN valves are to be operated with the appropriate Honeywell direct coupled actuators only. Water should be properly filtered, treated and conditioned according to local conditions and the recommendations of the boiler or chiller manufacturers. The installation of a strainers and filters is recommended. IMPORTANT The presence of excessive iron oxide (red rust) in the system voids the valve warranty. Required Operating Torque Both Honeywell non-spring return MVN and spring return low torque direct coupled actuators can be utilized with the VBN2 and VBN valves. VB valves use a patented seat design that reduces the torque needed from the actuator. Table 7. Close-off, Differential Pressure Ratings. Valve Type Valve Size (in.) Close-off Pressure Rating (psid) 2-way 1/2, / 10 1, 1-1/, 1-1/2, 2, 2-1/2, 100 -way 1/2, /, /, 1-1/2, 2, 2-1/2 0 NOTE: -way close-off ratings apply to -way valves with the B port plugged TYPICAL SPECIFICATIONS Valve Actuator Direct coupled actuator shall accept analog modulating [(0)2-10 Vdc], floating (tri-state), or two-position signal as indicated in the control sequence. Actuators shall be by Honeywell. Actuator shall provide minimum torque required for full valve shutoff position. Wiring terminals shall be provided for installation to control signal and power wiring. Actuator shall be available with housing suitable for outdoor installation. Accessories Identification tags shall be available for all valves; tags shall be indelibly marked with C V, model number, and tag location. Ball Valve Valve housing shall consist of forged brass rated at no less than 60 psi at 250 F. Standard valve ball shall consist of chemically nickel-plated brass. Manufacturer shall be able to provide optional 16 stainless steel ball and stem for 2-way valves. Valve shall have a blow-out proof stem with two EPDM O-rings with minimum 600 psi rating. Manufacturer shall be able to provide glass-filled polymer ball insert to make flow control equal percentage. Valves shall be Honeywell. The 2-way valves shall have EPDM O-rings behind ball seals to allow for a minimum close-off pressure of 100 psi with actuator which provides 5 lb-in. torque for 1/2 to in. sizes. Valve shall be available with a minimum of 5 unique C V values. Valve shall be available with threaded (FNPT) end connections. The -way valves shall be installed in a T configuration with actuator perpendicular to shaft. Valve shall not require elbows of any kind. The -way valves shall have EPDM O-rings behind ball seals to allow for a minimum closeoff pressure of 0 psi with an actuator that provides 5 lb-in. torque for 1/2 to 2-1/2 in. sizes. The -way valves must be available in both mixing and diverting configurations and shall be available with a minimum of 2 unique C V values. Valve shall be available with threaded (FNPT) end connections EFS 0

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